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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Crash when inspecting frame of generator","articleBody":"\u003c!--\r\n  Use this template for hard crashes of the interpreter, segmentation faults, failed C-level assertions, and similar.\r\n  Do not submit this form if you encounter an exception being unexpectedly raised from a Python function.\r\n  Most of the time, these should be filed as bugs, rather than crashes.\r\n\r\n  The CPython interpreter is itself written in a different programming language, C.\r\n  For CPython, a \"crash\" is when Python itself fails, leading to a traceback in the C stack.\r\n--\u003e\r\n\r\n**Crash report**\r\n\r\nThis was discovered in an `asyncio` program when interrupted with CTRL - C.\r\nMinimal Reproducer:\r\n```py\r\nimport gc\r\nimport inspect\r\n\r\ngc.set_threshold(1, 0, 0)\r\nf = []\r\n\r\ndef cb(*args):\r\n    f.append(inspect.stack())\r\n\r\ngc.callbacks.append(cb)\r\n\r\ndef gen():\r\n    yield 1\r\n\r\ng = gen()\r\ng.__next__()\r\n```\r\n\r\n**Error messages**\r\n\r\n```console\r\npython: Python/ceval.c:5436: _PyEval_EvalFrameDefault: Assertion `frame-\u003eframe_obj == NULL' failed.\r\nAborted (core dumped)\r\n```\r\n\r\n**Your environment**\r\n\r\n\u003c!-- Include as many relevant details as possible about the environment you experienced the bug in --\u003e\r\n\r\n- CPython versions tested on: Python 3.12.0a0 51fd4de101, Python 3.11.0b3+ 41e4b426ce\r\n- Operating system and architecture: Linux 5.4.0-1074-azure\r\n\r\n\u003c!--\r\nYou can freely edit this text. Remove any lines you believe are unnecessary.\r\n--\u003e\r\ncc @markshannon @pablogsal ","author":{"url":"https://github.com/kumaraditya303","@type":"Person","name":"kumaraditya303"},"datePublished":"2022-06-25T10:42:04.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/94262/cpython/issues/94262"}